/Engine/Plugins/Runtime/CommonUI/Source/CommonUI/Public/CommonVisualAttachment.h
Adds a widget as a zero-size attachment to another. Think icons to the left of labels, without changing the computed size of the label.
[UCLASS](Programming/UnrealArchitecture/Reference/Classes#classdeclaration)(ClassGroup=UI, Meta=(Category="Common UI")) class UCommonVisualAttachment : public [USizeBox](API\Runtime\UMG\Components\USizeBox)
FVector2D
ContentAnchor